I'm having some problems with Processing Environment. I'm actually using Foursquare Java Library V2 ( https://code.google.com/p/foursquare-api-java/). This code is the basic example found in the project wiki page, but I can't figure out how to run it!

It gives me an error like this
Exception in thread "Animation Thread" java.lang.NoClassDefFoundError: org/json/JSONException

I googled this kind of error and It's caused by a wrong definition of the java CLASSPATH.

Can anyone give me any hint. How I can fix it?

1.    String id = "***";
2.    String secret = "***";
3.    String callback = "***";
4.  public void searchVenues(String ll) throws FoursquareApiException {
5.    // First we need a initialize FoursquareApi.
6.     FoursquareApi foursquareApi = new FoursquareApi(id, secret, callback);
7.    
8.     // After client has been initialized we can make queries.
9. Result<VenuesSearchResult> result = foursquareApi.venuesSearch(ll, null, null, null, null, null, null, null, null, null, null);
10.    
11.     if (result.getMeta().getCode() == 200) {
12.       // if query was ok we can finally we do something with the data
13.       for (CompactVenue venue : result.getResult().getVenues()) {
14.         // TODO: Do something we the data
15.         System.out.println(venue.getName());
16.       }
17.     } else {
18.       // TODO: Proper error handling
19.       System.out.println("Error occured: ");
20.       System.out.println("  code: " + result.getMeta().getCode());
21.       System.out.println("  type: " + result.getMeta().getErrorType());
22.       System.out.println("  detail: " + result.getMeta().getErrorDetail());
23.     }
24.   }
25.  
26.   
27.   
28. void draw(){
29.   try{
30.    
31.     searchVenues("45.49985,9.191093");
32.  
33.     }catch (Exception e) {
34.      e.printStackTrace();}
35. }

 
OUTPUT

1. Exception in thread "Animation Thread" java.lang.NoClassDefFoundError: org/json/JSONException
2.     at _03_foursquare.searchVenues(_03_foursquare.java:32)
3.     at _03_foursquare.draw(_03_foursquare.java:57)
4.     at processing.core.PApplet.handleDraw(PApplet.java:1631)
5.     at processing.core.PApplet.run(PApplet.java:1530)
6.     at java.lang.Thread.run(Thread.java:680)
7. Caused by: java.lang.ClassNotFoundException: org.json.JSONException
8.     at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
9.     at java.security.AccessController.doPrivileged(Native Method)
10.     at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
11.     at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
12.     at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
13.     at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
14.     ... 5 more